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SKU: 220161
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This fitted dual-battery system adds two Hardcore 12V 120Ah AGM batteries to a compatible Isuzu NPS 75, providing a combined nominal auxiliary battery capacity of 240Ah.
The batteries are secured in a purpose-built three-position battery tray mounted to the Isuzu NPS chassis. Charging is managed by a REDARC BCDC Classic40 DC-DC battery charger, which accepts power from the vehicle’s compatible 24V electrical system and provides controlled charging to the 12V auxiliary battery bank.
The installation also includes a battery isolator and colour-coded 50A Anderson-style connectors for the required detachable electrical connections. The complete system is professionally mounted, electrically connected, configured and tested by AAV4x4 at our Brendale workshop.
The system includes two Hardcore 12V 120Ah AGM batteries configured as a compatible 12V auxiliary battery bank. Each battery has a nominal capacity of 120Ah at the published 20-hour discharge rate, providing a combined nominal capacity of 240Ah.
AGM stands for Absorbent Glass Mat. The electrolyte is retained within glass-mat separators between the internal battery plates, creating a sealed battery suitable for compatible vehicle auxiliary power installations.
The auxiliary battery bank can supply compatible vehicle accessories and electrical equipment. Available operating time depends on the connected load, discharge rate, temperature, battery condition and permitted depth of discharge.
Lead-acid battery capacity changes according to the rate at which the battery is discharged. The published capacity of each battery at 25°C is:
Higher-current loads therefore reduce the capacity available from the battery compared with the nominal 20-hour rating.
Available AGM battery capacity also varies with temperature. At the published 10-hour discharge rate, each battery provides approximately:
Lower temperatures reduce the immediately available capacity and should be considered when estimating auxiliary-system operating time.
The published constant-voltage charging specifications for each AGM battery at 25°C are:
The REDARC charger is configured with the appropriate AGM charging profile for the installed battery bank.
The REDARC BCDC1240D Classic40 is a 12V 40A in-vehicle DC-DC battery charger. It accepts an input voltage between 9V and 32V, allowing it to charge the 12V auxiliary battery bank from the Isuzu NPS vehicle electrical system.
The charger regulates the voltage and current delivered to the auxiliary batteries rather than directly connecting them to the vehicle starting batteries. This provides controlled multi-stage charging while maintaining separation between the starting and auxiliary electrical systems.
The BCDC Classic40 provides a maximum rated charging current of 40A and a nominal output power of 600W.
The charger applies a charging profile selected for the installed AGM batteries. Controlled charging helps maintain the required battery voltage even when the vehicle charging-system voltage changes during operation.
The REDARC charger is suitable for compatible 12V and 24V vehicle charging systems while providing a regulated 12V charging output.
In this installation, the charger allows the Isuzu NPS vehicle electrical system to charge the separate 12V AGM auxiliary battery bank.
The BCDC Classic40 provides separate inputs for the vehicle charging system and a compatible solar source. It can receive power from:
Solar panels are not included with this product unless separately specified.
The charger includes an integrated Maximum Power Point Tracking solar regulator. MPPT control continually adjusts the operating point of a compatible solar source to obtain the available solar power efficiently.
The solar input accepts 9–32V DC. Any connected solar panel or array must remain within the voltage, current and power limits of the REDARC charger.
Green Power Priority gives available solar energy preference over alternator input. When suitable solar power is available, the charger uses that energy first and supplements it with vehicle power when required.
The system uses a purpose-built three-position battery tray designed for compatible Isuzu NPS chassis applications.
This installation uses two of the three available battery positions. The tray can accommodate up to three compatible batteries, or the remaining position may be used for compatible electrical equipment depending on the final installation layout.
The tray mounts directly to compatible chassis points and provides a dedicated structure for securing the auxiliary battery system beneath the vehicle.
A rotary battery isolator switch is included to provide a dedicated means of disconnecting the associated auxiliary battery circuit.
The supplied switch is rated at 275A at 12V and incorporates a removable control knob. It allows the relevant circuit to be isolated for inspection, maintenance or electrical-system servicing.
The system includes red and grey two-pole 50A Anderson-style connectors. The colour-coded and mechanically keyed housings help distinguish separate electrical connections within the completed installation.
The 50A designation identifies the connector class. The permitted current through each completed circuit remains limited by the wiring, circuit protection, connected equipment and lowest-rated component.
This Isuzu NPS 75 dual-battery system is professionally fitted by AAV4x4 at our Brendale workshop. Installation includes:
Final component positions and cable routes depend on the vehicle configuration, available chassis space and existing electrical equipment.
| Product | Isuzu NPS 75 Dual AGM Auxiliary Battery System |
|---|---|
| Vehicle application | Compatible Isuzu NPS 75 vehicles |
| Number of auxiliary batteries | 2 |
| Battery type | Hardcore AGM battery |
| Nominal voltage per battery | 12V |
| Nominal capacity per battery | 120Ah at the 20-hour rate |
| Combined nominal capacity | 240Ah |
| Capacity per battery at 10-hour rate | 110Ah at 11A |
| Capacity per battery at 5-hour rate | 102Ah at 20.4A |
| Capacity per battery at 1-hour rate | 72Ah at 72A |
| Internal resistance | Not more than 4.5mΩ when fully charged at 25°C |
| Float charging voltage | 13.6–13.8V at 25°C |
| Cycle charging voltage | 14.4–14.9V at 25°C |
| Initial charging current | Less than 24A per battery |
| Battery dimensions | 328 x 171 x 214mm each |
| Battery total height | 218mm each |
| Battery net weight | 32.39kg each |
| Combined battery net weight | 64.78kg |
| DC-DC charger | REDARC BCDC Classic40 |
| Charger model | BCDC1240D |
| Charger output voltage | 12V DC |
| Maximum rated charging current | 40A |
| Nominal charger output power | 600W |
| Vehicle input-voltage range | 9–32V DC |
| Solar input-voltage range | 9–32V DC |
| Maximum charging voltage | 15.3V |
| Solar regulator | Integrated MPPT |
| Supported battery types | AGM, Gel, standard lead-acid, calcium and LiFePO4 |
| Alternator compatibility | Standard and variable-voltage smart alternators |
| Charger operating temperature | -20°C to 80°C |
| Charger dimensions | 165 x 120 x 37mm |
| Charger weight | 1kg |
| Battery tray | Three-position Isuzu NPS chassis-mounted battery tray |
| Tray battery capacity | Up to three compatible batteries |
| Tray positions used | 2 of 3 |
| Battery isolator | On/off switch rated at 275A at 12V with removable knob |
| Electrical connectors | Two-pole 50A Anderson-style connectors |
| Connector colours | Red and grey |
| Installation | Professionally fitted by AAV4x4 at Brendale |
The supplied REDARC BCDC1240D is a 40A charger. It accepts input from a compatible 12V or 24V vehicle electrical system and provides a regulated 12V charging output.
This package includes two 120Ah AGM batteries. Although the tray provides three battery positions, the third position is not fitted with a battery as part of this product.
A solar panel is not included. The REDARC charger provides an MPPT solar input for connection to a compatible solar source where required.
Available auxiliary capacity reduces at higher discharge rates and lower temperatures. Permitted electrical loads depend on the connected equipment, cabling, circuit protection and complete vehicle electrical configuration.
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